Merge commit 'b7902225d698a107df2cf8b4ca221caad38fa464' into glitch-soc/merge-upstream

Conflicts:
- `spec/validators/status_length_validator_spec.rb`:
  Upstream refactored tests to stub `StatusLengthValidator::MAX_CHARS`
  while glitch-soc had custom code to read from `MAX_TOOT_CHARS`.
  Switched to using upstream's implementation of the tests.

.github/workflows/lint-css.yml

@@ -38,9 +38,5 @@ jobs:
       - name: Set up Javascript environment
         uses: ./.github/actions/setup-javascript
 
-      - uses: xt0rted/stylelint-problem-matcher@v1
-
-      - run: echo "::add-matcher::.github/stylelint-matcher.json"
-
       - name: Stylelint
-        run: yarn lint:css
+        run: yarn lint:css -f github